CODEWITHSUNDEEP
labview
user2344158
user2344158

Reputation: 13

Value of Numeric control in script, LabView

I am trying to control a KEITHLEY 2612A SourceMeter using labview. I have installed the appropriate drivers and I managed to connect to the instrument using VISA. Currently I am just experimenting with the scripting language, which the instrument uses.

Is it possible to use a Numeric Controller - a Knob for example - and use its value in the script to be loaded to the instrument? I don't have enough reputation points to add images.

EDIT

ON = 1
OFF = 0

function hello()
    display.clear()
    display.setcursor (1,7)
    display.settext ("DONE :)")
end

smub.reset()
smub.source.output = ON

--Set the measurement integration time
smub.measure.nplc = 1
smub.measure.delay = 0.05

--Configure the reading buffers
smub.nvbuffer1.clear()
smub.nvbuffer1.appendmode = 1
smub.nvbuffer1.collecttimestamps = 1
smub.nvbuffer1.collectsourcevalues = 0
smub.nvbuffer1.fillmode = smub.FILL_ONCE

for i = 0, 0.5, 0.01 do
    smub.source.levelv = i
    reading  = smub.measure.i (smub.nvbuffer1)
end

delay(5)

hello()

smub.source.output = OFF

delay(1)

display.clear()
display.setcursor(1,1)
display.settext(string.format("%g", smub.nvbuffer1[1]))
delay(5)
display.clear()
display.settext(string.format("%g", smub.nvbuffer1[50]))

Block diagram: https://i.sstatic.net/siZAa.png Front panel: https://i.sstatic.net/A9MVF.png

Upvotes: 0

Views: 507

Answers (2)

Joe Friedrichsen
Joe Friedrichsen

Reputation: 1986

LabVIEW has standard string manipulation primitives, and you can accomplish your goal by using string substitution: place a sentinel string in your script and replace it with the value from the knob.

Example

Here, I've used __BUFFER_NUMBER__ as a unique string in the Script Format input terminal. LabVIEW searches for that string and replaces it with the knob's current value.

enter image description here

Block diagram

enter image description here

Upvotes: 2

WG-
WG-

Reputation: 1070

You add the knob control, wire the value to the number-to-string VI (http://zone.ni.com/reference/en-XX/help/371361M-01/glang/number_to_fract_string/ ), and wire that to the "Search and replace string VI" (http://zone.ni.com/reference/en-XX/help/371361M-01/glang/search_and_replace_string/) you search for the value in the script that you want to replace.

Upvotes: 0

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